In many areas of knowledge there are the encyclopaedic reference books basic terms and concepts of this science are explained in that. The encyclopaedias have mathematics and physics, biologists and geographers, physicians and engineers. Thus these encyclopaedias from year to year are reprinted stereotype - the spirits of the times are powerless to change atomic weight of chemical elements or relation of cathetuses to the hypotenuse. Psychology in this row occupies the special position - whether that privileged, whether that waning: psychological dictionaries only in the last few years and only a few ten is published in our country, and each of them differs in originality. In attempts to get a clear idea of the value of one or another term it is possible to leaf over dozen different editions and only tangled in interpretations and variant reading. As a result psychologists manipulate terms that nearly everybody understands in its own way and from it can not find mutual understanding with colleagues. And some words included in a fashion are even known far not all. In this not simple situation in the release of newspaper "The School psychologist" and an idea to "collate a professional clock" was born - to take away on a court colleagues the family encyclopaedia in a newspaper with the purpose of getting a clear idea of some misty and difficult concepts. Heading was so born "Thesaurus", in that for 10 ten of reasons were published. Alas, century newspapers unlong, and the most published texts now are not accessible to the reader. Saving a hope, that the value of these texts at the years is not lost, an author took away from them those considered that most interesting and important, and collected them under this cover.